Legend that is not displayed

There seems to be a critical JS issue related to a theme file and that may be causing conflicts with NextGen’s JS dependent elements. I hope that you wouldn’t mind checking with the theme provider’s support to see, perhaps they have any fixes or updates for it.

jquery.masonry.min.js?ver=1.0:10 Uncaught TypeError: Cannot read property 'call' of undefined
    at h (jquery.masonry.min.js?ver=1.0:10)
    at n.fn.init.b.fn.imagesLoaded (jquery.masonry.min.js?ver=1.0:10)
    at e.z._waitForContent (jquery.qtip.js:645)
    at e.z._update (jquery.qtip.js:631)
    at e.z._updateContent (jquery.qtip.js:651)
    at e.z.render (jquery.qtip.js:199)
    at e.<anonymous> (jquery.qtip.js:1496)
    at d (jquery.js?ver=1.12.4-wp:2)